当整个市场环境或某些全局性的因素发生变动时，即发生系统性风险时，（）。A.各种股票的

蛛网膜下腔出血病人可以不出现()。

A．剧烈头痛

B．脑膜刺激征

C．频繁呕吐

D．一过性意识障碍

E．一侧肢体瘫痪

Everyone becomes a little more forgetful as they get older, but men’s minds decline more than women’s, according to the results of a worldwide survey.

Certain differences seem to be inherent in male and female brains: Men are better at maintaining and dealing with mental images (useful in mathematical reasoning and spatial skills), while women tend to excel (擅长) at recalling information from their brain’s files ( helpful with language skills and remembering the locations of objects).

Many studies have looked for a connection between sex and the amount of mental decline (衰退) people experience as they age, but the results have been mixed.

Some studies found more age-related decline in men than in women, while others saw the opposite or even no relationship at all between sex and mental decline. Those results could be improper because the studies involved older people, and women live longer than men: The men tested are the survivors, "so they’re the ones that may not have shown such cognitive decline," said study team leader Elizabeth of the University of Warwick in England.

People surveyed completed four tasks that tested sex-related cognitive skills : matching an object to its rotated form, matching lines shown from the same angle, typing as many words in a particular category (范畴) as possible in the given time, e.g. "object usually colored gray", and recalling the location of objects in a line drawing. The first two were tasks at which men usually excel; the latter were typically dominated by women.

Within each age group studied, men and women performed better in their separate categories on average. And though performance declined with age for both genders, women showed obviously less decline than men overall.

According to the passage, which of the following can NOT be typed into the same category（）

A．Cloud.

B．Sheep.

C．Trees.

D．Goos

2009年8月，某钢铁厂（增值税一般纳税人）从某废旧物资回收经营单位（增值税一般纳税人）购进废钢废铁，取得的增值税专用发票上注明的金额为68万元；向某从事废旧物资回收经营的小规模纳税人购进废钢废铁，取得的普通发票上注明的金额为21万元；向某煤炭经销公司购进煤炭，取得的增值税专用发票上注明的金额为54万元；委托某货运单位（自开票纳税人）运输购买的货物，取得的运费发票上注明运费3万元、保险费0.8万元、装卸费1.2万元。假设该钢铁厂取得的抵扣凭证均在当月通过认证并申报抵扣，上述业务允许抵扣进项税额（）万元

A、14.03

B、14.08

C、16.13

D、18.79

中药合剂与口服液的主要区别在于（）。

A、是否添加矫味剂及剂量

B、是否含醇

C、是否含有抑菌剂

D、是否含有西药成分

（）是将试样解热到熔点以下某一温度（一般控制在制品使用温度以下10～20℃，或热变形温度以下10～20℃为宜），以等温或缓慢变温的方式使结晶逐渐完善化的过程。

A、淬火

B、退火

C、热处理

D、结晶